Giy or GIY may refer to:
GIY Ireland (Grow It Yourself Ireland), an Ireland-based global movement known as GIY Yoy people or Giy, an ethnic group in Southeast Asia Probiz Guinee (ICAO Airline code: GIY) Giyani Airport (IATA airports code), South Africa; See List of airports by IATA code: G Giyug language (ISO 639:g language code: Giy)
See also GIY-YIG, a structural family of Homing endonuclease Guy (disambiguation) Gay (disambiguation) Goy (disambiguation)